Annealing and bluing furnace.



Ho. 65|,46l, Patented lune l2, i900. J. JENKINS.

ANNEALING AND BLUIHG FURNACE.

(Appumflan fllod on. 14, 1899.) (No Model.)

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vF L:- ,INVENTOR siren rates ATENT ANNEALING AND BLUlNG FURNACE.

SPECIFICATION forming part of Letters Patent No. 651,461, dated June 12, 1900.

To all whom it may concern:

Be it known that I, JOHN JENKINS, a citizen of the United States of America, residing at No. 17 Goodrich street, Allegheny, in the county of Allegheny and State of Pennsylvania, haveinvcnted certain new and usefullmprovements in Annealing and llluing Furnaces; and I do hereby declare the following to be a full, clear, and exact description thereof,referencc being had to the accompanying drawings, which form a part of this specificar in g and bluin g furnace for tin, tems, or planish plates; and it consists ofxa hot and cold chamber in which the sheets to be annealed are carried from one end of the furnace to the l I other through a muflle, by means of a series of rolls, the one geared to the other in a manner that will give a continuous even movement to the sheets during. the annealing or 'blning; and my invention also consists in the cold-rolling of the sheets after they have passed from the annealing oven, together with the certain details of construction and combination of parts,as will be fully described hereinafter.

ln the accompanying drawings, Figure 1 is a sidesectional elevation of my improved furnace and means for operating the same constructed and arranged in accordance with my invention. Fig. 2 is a top plan view of the same. Fig. 3 is an end sectional elevation through the hot chamber or annealing-oven. Fig. 4 is a diagrammatic view of the cold-rolls and means of carrying the plates thereto.

To construct a furnacein accordance with my invention, I build from a suitable refractory material a long narrow furnace separated or divided by a cross-wall 0 into two chambers Aand B, the chamber A being provided with a gas-burner 1 and flue 2, by means of which the said chamber may be heated to the required temperature necessary to anneal the sheets. The chamber Bis for the purpose of gradually reducing the temperature of the 1 sheets as they pass from the hot chamber A,

'; series of roller-s3, monntedin pairs, with their and when the said sheets are expelled from the rear of the furnace. they will be compara-' tively cold. To-carry these sheets from the front of the furnace to the rear, I arrange a Application filed October 14,1899. lirrial Nov 733,587. No mmleLl shafts 4 journaled in the side walls of the furnace. 'lhese rollers 3 are placed in line the one pair with the other, and of a distance apart less than the length of the sheets operated upon, and the said rollers 3 are of a walls of the furnace. Inclosing these rollers S is a mulile 6, formed of cast metal or other suitable materiahwhich is of a form that will properly guide the sheets from one pair of rollers 3 to the next ahead and is used to pro tect the sheets from the air for a purpose well known in the art. Each pail-of rollers 33 are geared the one with the other by means of small gear-wheels 8, attached to their respective shafts 4. To rotate the entire train of rollers 4 in unison, a small bevel-gear 9 is attached to the shaftt of each of the lower rollers, the said gears meshing with a series of similar gears 9, attached to a counter-shat t 1.0, to which a drive-pulley 11. is connected. At the front and rear ends of the muffle 6 are hinged swinging flaps 7, adapted to close the entrance and exit, and thereby prevent the escape of heated air and to exclude cold air from entrance therein and at the same time not interfere with the entrance of the sheets into the muffle 6 or the exit from the same when traveling in the proper direction.

Arranged at the exit of the muffle 6 is a set or series of cold-rolls 5, which may be of equal or varying diameter, as shown in Fig. 4, the same being either in close proximity to the exit or at some distance away. When these cold-rolls?) are located at a distance from the furnace, the sheets may be carried thereto and entered in the rolls in any suitable or desired manner.

In operation the sheets to be annealed are entered into the muflle 6, and by means .of the rotary movement of the rollers 3 carried forward slowly through the hot chamber ,A, gathering a sufficient temperature before reaching the end of the same. In their continuous'passage the sheets are carried into and through the cooling-chamber B, reducing the temperature until almost cold before leaving the exit of the muiile, and from this point the sheets are carried to and through the coldrolls 5, thereby making a continuous operation of the annealing and cold-rolling.

In blding metal sheets the hot chamber. A

length almost equal to the space between the and its mufiie 6 are all that is necessary. Therefore the cold chamber B may be dis peused sigith. It'is obvious that various slight modifications of myimprovd annealing-furnace may be made without departing from the spirit of my invention. Therefore I do not confine myself to the exact construction shown and described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combiuation'with a furnace composed of refractory material divided by a central wall into a hot chamber and a coolingchamber, said wall having a horizontal open: ingfa'nd means for heating the hot chamber, of a series of pairs of rolls arranged in 'said furna'ceand in front of the hot chamber, said pairs of rolls being arranged in line with each other,- a mufile extending through said horizontal opening in the wall and inclosing said rolls throughout the series, and means arranged at the front and rear of said mufiie for excluding the. cold air therefrom, substantially as described.

2. The combination with a furnace composed of refractory material and divided by a central wall having an opening into a hot chamber and a cooling-chamber, and means for heating the hot chambe', of a series of pairs of rolls arranged within said furnace and in front of the hot chamber, said pairs of rolls being arranged in line with each other, means for driving said rolls, a muffle extending through the opening in the central wall and inclosing said rolls throughout the series, and means arranged at the front and rear of said muffle for excluding the cold air therefrom, substantially as shown and described.

3. The combination with a furnace composed of refractory material and divided by a central wall having an opening into a hot chamber and'a cooling-chamber, means for heating the hot chamber,.a series of pairs of rolls arranged in sequence throughout the said chambers and at the front and rear of the furnace, a mufile extending through the opening in the central wall and inclosing said rolls, and means arranged at the front and rear of said mufile for excluding the cold air therefrom, substantially as described.

In testimony whereof I have hereunto affixed my signature in the presence of two sub-' scribing witnesses.

JOIIN JENKINS. \Vitnesses:

M. E. HARRISON, JAs. V. MGMASTERS. 

